STOCK OPTION PLANS (Details) (USD $)	12 Months Ended														84 Months Ended
	Aug. 31, 2012		Aug. 31, 2011		Aug. 31, 2010		Aug. 31, 2009		Aug. 31, 2008		Aug. 31, 2007		Aug. 31, 2006		Aug. 31, 2012	Apr. 07, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee stock-based compensation expense	$ 4,487,000		$ 1,920,000		$ 217,000										$ 7,838,000
Assumptions of black scholes option pricing model for stock-based compensation expense [Abstract]
Risk-free interest rate													5.00%	[1],[2]
Risk-free interest rate, minimum	0.68%	[1]	1.60%	[1]	2.10%	[1]	1.50%	[1]	2.00%	[1]	4.00%	[1]
Risk-free interest rate, maximum	1.20%	[1]	2.40%	[1]	3.10%	[1]	3.20%	[1]	3.75%	[1]	5.00%	[1]
Expected life of stock option			6 years	[1]			7 years	[1]	8 years	[1]	8 years	[1]	10 years	[1],[2]
Annual volatility											100.00%	[1]	100.00%	[1],[2]
Annual volatility, minimum	121.00%	[1]	88.00%	[1]	55.00%	[1]	170.00%	[1]	109.00%	[1]
Annual volatility, maximum	125.00%	[1]	116.00%	[1]	245.00%	[1]	240.00%	[1]	128.00%	[1]
Dividend rate	0.00%		0.00%		0.00%		0.00%		0.00%		0.00%		0.00%
Consultant stock based compensation expense	72,000		197,000		78,000										755,000
Option shares
Outstanding beginning balance (in shares)	3,581,000		1,391,000		989,000		907,000		684,000		580,000		0		0
Granted (in shares)	2,722,000		2,232,000		303,000		82,000		223,000		107,000		580,000
Assumed in the 2009 Merger (in shares)					161,000
Exercised (in shares)	160,000		(39,000)		(38,000)		0		0		(3,000)		0
Canceled (in shares)	(18,000)		(3,000)		(24,000)		0		0		0		0
Outstanding ending balance (in shares)	6,125,000		3,581,000		1,391,000		989,000		907,000		684,000		580,000		6,125,000
Weighted- average exercise price
Outstanding (in dollars per share)	$ 6.64		$ 14.25		$ 2.42		$ 2.54		$ 2.63		$ 2.64		$ 0		$ 0
Granted (in dollars per share)	$ 5.38		$ 3.39		$ 2.29		$ 1.13		$ 2.27		$ 2.56		$ 2.64
Assumed in the 2009 Merger (in dollars per share)					$ 114.12
Exercised (in dollars per share)	$ 2.28		$ 2.44		$ 1.69		$ 0		$ 0		$ 2.57		$ 0
Canceled (in dollars per share)	$ 119.27		$ 1,088.33		$ 142.42		$ 0		$ 0		$ 0		$ 0
Outstanding (in dollars per share)	$ 5.87		$ 6.64		$ 14.25		$ 2.42		$ 2.54		$ 2.63		$ 2.64		$ 5.87
Exercisable
Outstanding (in shares)	1,881,000		1,089,000		826,000		601,000		273,000		4,000		0		0
Granted (in shares)	1,279,000		835,000		161,000		0		0		0		0
Assumed in 2009 Merger (in shares)					158,000
Exercised (in shares)	0		0		0		0		0		0		0
Canceled (in shares)	0		0		0		0		0		0		0
Outstanding (in shares)	2,995,000		1,881,000		1,089,000		826,000		601,000		273,000		4,000		2,995,000
Weighted- average fair value of options granted
Outstanding (in dollars per share)	$ 2.30		$ 1.87		$ 2.40		$ 2.39		$ 2.45		$ 2.47		$ 0		$ 0
Granted (in dollars per share)	$ 4.62		$ 2.54		$ 1.24		$ 1.04		$ 2.21		$ 2.31		$ 2.47
Assumed in the 2009 Merger (in dollars per share)					$ 2.63
Exercised (in dollars per share)	$ 1.72		$ 2.02		$ 1.49		$ 0		$ 0		$ 2.40		$ 0
Canceled (in dollars per share)	$ 0.02		$ 0		$ 2.00		$ 0		$ 0		$ 0		$ 0
Outstanding (in dollars per share)	$ 3.37		$ 2.30		$ 1.87		$ 2.40		$ 2.39		$ 2.45		$ 2.47		$ 3.37
Weighted average intrinsic values of stock options outstanding and expected to vest	5,947,000		5,783,000												5,947,000
Weighted average intrinsic values of stock options exercisable	4,323,000		3,302,000												4,323,000
Options available for grant under the 2010 Equity Incentive Plan (in shares)			3,692,000
Basis of increase in grant pool as percentage of common stock outstanding on specified dates (in hundredths)			5.00%
Maximum number of options increased (in shares)			6,000,000
Additional stock options available for grant due to replenishments (in shares)	2,528,000		1,778,000												2,528,000	1,630,000
Percentage of accelerated vesting of unvested stock options allowed as per amendments (in hundredths)			50.00%
Minimum age of employee for extension of termination date			62 years
Minimum years of continuous service prior to retirement			5 years
Minimum number of days of continuous service in case of death or permanent disability			90 days
Extension of termination date			18 months
Options outstanding under stock option plans [Abstract]
Options outstanding, number of options outstanding and expected to vest (in shares)	6,125,000														6,125,000
Options outstanding, weighted-average remaining contractual life	8 years 1 month 2 days
Options outstanding, weighted-average exercise price (in dollars per share)	$ 5.87														$ 5.87
Options exercisable, number of options exercisable (in shares)	2,995,000														2,995,000
Options exercisable, weighted average exercise price (in dollars per share)	$ 7.10														$ 7.10
Total unrecognized compensation cost	11,200,000														11,200,000
Weighted-average period over which compensation cost expected to be recognized	3 years
$ 0 to $1.00 [Member]
Options outstanding under stock option plans [Abstract]
Range of exercise prices, minimum (in dollars per share)	$ 0
Range of exercise prices, maximum (in dollars per share)	$ 1.00
Options outstanding, number of options outstanding and expected to vest (in shares)	10,000														10,000
Options outstanding, weighted-average remaining contractual life	6 years 7 months 17 days
Options outstanding, weighted-average exercise price (in dollars per share)	$ 0.85														$ 0.85
Options exercisable, number of options exercisable (in shares)	4,000														4,000
Options exercisable, weighted average exercise price (in dollars per share)	$ 0.85														$ 0.85
$ 1.01 to $2.00 [Member]
Options outstanding under stock option plans [Abstract]
Range of exercise prices, minimum (in dollars per share)	$ 1.01
Range of exercise prices, maximum (in dollars per share)	$ 2.00
Options outstanding, number of options outstanding and expected to vest (in shares)	80,000														80,000
Options outstanding, weighted-average remaining contractual life	6 years 9 months 14 days
Options outstanding, weighted-average exercise price (in dollars per share)	$ 1.77														$ 1.77
Options exercisable, number of options exercisable (in shares)	73,000														73,000
Options exercisable, weighted average exercise price (in dollars per share)	$ 1.75														$ 1.75
$ 2.01 to $3.00 [Member]
Options outstanding under stock option plans [Abstract]
Range of exercise prices, minimum (in dollars per share)	$ 2.01
Range of exercise prices, maximum (in dollars per share)	$ 3.00
Options outstanding, number of options outstanding and expected to vest (in shares)	1,430,000														1,430,000
Options outstanding, weighted-average remaining contractual life	6 years 1 month 24 days
Options outstanding, weighted-average exercise price (in dollars per share)	$ 2.65														$ 2.65
Options exercisable, number of options exercisable (in shares)	1,090,000														1,090,000
Options exercisable, weighted average exercise price (in dollars per share)	$ 2.59														$ 2.59
$ 3.01 to $4.00 [Member]
Options outstanding under stock option plans [Abstract]
Range of exercise prices, minimum (in dollars per share)	$ 3.01
Range of exercise prices, maximum (in dollars per share)	$ 4.00
Options outstanding, number of options outstanding and expected to vest (in shares)	1,764,000														1,764,000
Options outstanding, weighted-average remaining contractual life	8 years 2 months 23 days
Options outstanding, weighted-average exercise price (in dollars per share)	$ 3.50														$ 3.50
Options exercisable, number of options exercisable (in shares)	1,088,000														1,088,000
Options exercisable, weighted average exercise price (in dollars per share)	$ 3.51														$ 3.51
$ 4.01 to $5.00 [Member]
Options outstanding under stock option plans [Abstract]
Range of exercise prices, minimum (in dollars per share)	$ 4.01
Range of exercise prices, maximum (in dollars per share)	$ 5.00
Options outstanding, number of options outstanding and expected to vest (in shares)	102,000														102,000
Options outstanding, weighted-average remaining contractual life	7 years 5 months 1 day
Options outstanding, weighted-average exercise price (in dollars per share)	$ 4.71														$ 4.71
Options exercisable, number of options exercisable (in shares)	86,000														86,000
Options exercisable, weighted average exercise price (in dollars per share)	$ 4.71														$ 4.71
$ 5.01 to $6.00 [Member]
Options outstanding under stock option plans [Abstract]
Range of exercise prices, minimum (in dollars per share)	$ 5.01
Range of exercise prices, maximum (in dollars per share)	$ 6.00
Options outstanding, number of options outstanding and expected to vest (in shares)	2,347,000														2,347,000
Options outstanding, weighted-average remaining contractual life	9 years 1 month 17 days
Options outstanding, weighted-average exercise price (in dollars per share)	$ 5.17														$ 5.17
Options exercisable, number of options exercisable (in shares)	572,000														572,000
Options exercisable, weighted average exercise price (in dollars per share)	$ 5.13														$ 5.13
$ 6.01 to $7.00 [Member]
Options outstanding under stock option plans [Abstract]
Range of exercise prices, minimum (in dollars per share)	$ 6.01
Range of exercise prices, maximum (in dollars per share)	$ 7.00
Options outstanding, number of options outstanding and expected to vest (in shares)	278,000														278,000
Options outstanding, weighted-average remaining contractual life	9 years 6 months
Options outstanding, weighted-average exercise price (in dollars per share)	$ 6.48														$ 6.48
Options exercisable, number of options exercisable (in shares)	29,000														29,000
Options exercisable, weighted average exercise price (in dollars per share)	$ 6.48														$ 6.48
$ 7.01 to $8.00 [Member]
Options outstanding under stock option plans [Abstract]
Range of exercise prices, minimum (in dollars per share)	$ 7.01
Range of exercise prices, maximum (in dollars per share)	$ 8.00
Options outstanding, number of options outstanding and expected to vest (in shares)	70,000														70,000
Options outstanding, weighted-average remaining contractual life	9 years 5 months 16 days
Options outstanding, weighted-average exercise price (in dollars per share)	$ 7.75														$ 7.75
Options exercisable, number of options exercisable (in shares)	9,000														9,000
Options exercisable, weighted average exercise price (in dollars per share)	$ 7.75														$ 7.75
$ 8.01 to $964.24 [Member]
Options outstanding under stock option plans [Abstract]
Range of exercise prices, minimum (in dollars per share)	$ 8.01
Range of exercise prices, maximum (in dollars per share)	$ 964.24
Options outstanding, number of options outstanding and expected to vest (in shares)	44,000														44,000
Options outstanding, weighted-average remaining contractual life	3 years 18 days
Options outstanding, weighted-average exercise price (in dollars per share)	$ 249.34														$ 249.34
Options exercisable, number of options exercisable (in shares)	44,000														44,000
Options exercisable, weighted average exercise price (in dollars per share)	$ 249.34														$ 249.34
Minimum [Member]
Assumptions of black scholes option pricing model for stock-based compensation expense [Abstract]
Expected life of stock option	5 years	[1]			6 years	[1]
Maximum [Member]
Assumptions of black scholes option pricing model for stock-based compensation expense [Abstract]
Expected life of stock option	6 years	[1]			7 years	[1]
General and Administrative Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee stock-based compensation expense															6,245,000
Assumptions of black scholes option pricing model for stock-based compensation expense [Abstract]
Consultant stock based compensation expense															147,000
Research and Development Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee stock-based compensation expense															1,593,000
Assumptions of black scholes option pricing model for stock-based compensation expense [Abstract]
Consultant stock based compensation expense															$ 608,000

[1] Dividend rate is 0% for all periods presented.

[2] Stock-based compensation expense was recorded on the consolidated statements of operations commencing on the effective date of ASC 718, September 1, 2006. Prior to September 1, 2006, stock based compensation was reflected only in the footnotes to the consolidated statements of operations, with no effect on the consolidated statements of operations, per the guidelines of APB Opinion No. 25. Consultant stock-based compensation expense has been recorded on the consolidated statements of operations since inception.